Born in 1644, Tadatsuna was the natural son of the Shodai Omi (No) Kami. 2nd generation Tadatsuna iniatially went under the name of Tadakuni known as Nandayu.

It is not known when he inherited the No Kami Title. It has been assumed he began using the title when he changed his name from Tadakuni to Tadatsuna sometime around Kanbun 05 to Kanbun 10, 1665 to 1670. It has been proven however, that he did not use the inscription Ikkanshi until Genroku 02, 1690. The last known signed blade is inscribed 1693.

Tadatsuna is noted as an expert carver of Horimono as well as an excellent Swordsmith. He is rated as a Jo-Jo-Saku Smith with Ryowazimono cutting test ranking.

The sword is 45.7 cm in length. The Jitetsu is Ko-Itame, well grained with Ji-Nie attached. The Hamon begins with a Yakidashi changing to Gunome/Choji/Midare with thick Nioiguchi Ashi, Sunagashi and Kinsuji.

The sword has a very interesting Koshirai with signed blade and Kodzuka, it is certified by NBTHK as Tokubetsu Kicho status (especially precious).

In Hawley's book, "Hawley's Japanese Swordsmiths" (Commemorative Centenary Edition), he is rated as 150 points Smith.